Use this RadRichTextBox subclass to add a context menu with spellcheck and normal (cut, copy, paste, etc) operations.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Telerik.WinControls;
using System.Collections;
using Telerik.WinControls.RichTextBox;
using Telerik.WinControls.RichTextBox.Layout;
using Telerik.WinControls.UI;
using Telerik.WinControls.RichTextBox.Model;
using System.Diagnostics;
using System.Linq;
using Telerik.WinControls.RichTextBox.Proofing;
class MyRadRichTextBox : RadRichTextBox
{
private void ReplaceCurrentWord(SpanLayoutBox spanBox, string newWord)
{
this.Document.CaretPosition.MoveToInline(spanBox, 0);
DocumentPosition endPosition = new DocumentPosition(this.Document.CaretPosition);
MoveToCurrentWordEnd(endPosition);
this.Document.Selection.Clear();
this.Document.Selection.AddSelectionStart(this.Document.CaretPosition);
this.Document.Selection.AddSelectionEnd(endPosition);
this.Insert(newWord);
}
/// <summary>
/// DocumentPosition.MoveToCurrentWorkEnd was including characters other than Alpha-numerics.
/// This function will stop at non alphanumeric characters.
/// </summary>
/// <param name="position"></param>
private void MoveToCurrentWordEnd(DocumentPosition position)
{
position.MoveToCurrentWordEnd();
this.Document.Selection.Clear();
this.Document.Selection.AddSelectionStart(this.Document.CaretPosition);
this.Document.Selection.AddSelectionEnd(position);
string selectedText = this.Document.Selection.GetSelectedText();
int length = selectedText.Length;
int indexOfEnd = selectedText.TakeWhile(c => char.IsLetterOrDigit(c)).Count();
while (indexOfEnd < length)
{
position.MoveToPrevious();
length--;
}
this.Document.Selection.Clear();
}
private RadDropDownMenu BuildContextMenu(SpanLayoutBox spanBox)
{
RadDropDownMenu menu = new RadDropDownMenu();
RadMenuItem menuItem;
if (this.Document.Selection.IsEmpty && this.IsSpellCheckingEnabled && spanBox != null)
{
this.Document.CaretPosition.MoveToInline(spanBox, 0);
string spanBoxTextAlphaNumericOnly = String.Concat(spanBox.Text.TakeWhile(c => char.IsLetterOrDigit(c)));
if (spanBoxTextAlphaNumericOnly.Length > 0 && !this.SpellChecker.CheckWordIsCorrect(spanBoxTextAlphaNumericOnly))
{
string[] suggestions = (string[])this.SpellChecker.GetSuggestions(spanBox.Text);
if (suggestions.Length <= 0)
{
menuItem = new RadMenuItem("(No Spelling Suggestions)");
menuItem.Enabled = false;
menu.Items.Add(menuItem);
}
foreach (string suggestion in suggestions)
{
menuItem = new RadMenuItem(suggestion);
menuItem.Click += (object sender, EventArgs e) => { ReplaceCurrentWord(spanBox, (sender as RadMenuItem).Text); };
menu.Items.Add(menuItem);
}
menu.Items.Add(new SeparatorElement());
menuItem = new RadMenuItem("Add to Dictionary");
menuItem.Click += (object sender, EventArgs e) => { this.SpellChecker.AddWord(spanBoxTextAlphaNumericOnly); };
menu.Items.Add(menuItem);
menu.Items.Add(new SeparatorElement());
}
}
menuItem = new RadMenuItem("Undo");
menuItem.Click += (object sender, EventArgs e) => { this.Undo(); };
menu.Items.Add(menuItem);
menu.Items.Add(new SeparatorElement());
menuItem = new RadMenuItem("Cut");
menuItem.Click += (object sender, EventArgs e) => { this.Cut(); };
menu.Items.Add(menuItem);
menuItem = new RadMenuItem("Copy");
menuItem.Click += (object sender, EventArgs e) => { this.Copy(); };
menu.Items.Add(menuItem);
menuItem = new RadMenuItem("Paste");
menuItem.Click += (object sender, EventArgs e) => { this.Paste(); };
menu.Items.Add(menuItem);
menuItem = new RadMenuItem("Delete");
menuItem.Click += (object sender, EventArgs e) => { this.Delete(false); };
menu.Items.Add(menuItem);
menu.Items.Add(new SeparatorElement());
menuItem = new RadMenuItem("Select All");
menuItem.Click += (object sender, EventArgs e) => { this.Document.Selection.SelectAll(); };
menu.Items.Add(menuItem);
return menu;
}
protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Right)
{
SpanLayoutBox spanBox = this.Document.GetLayoutBoxByPosition(e.Location) as SpanLayoutBox;
BuildContextMenu(spanBox).Show(this, e.Location);
}
base.OnMouseDown(e);
}
}
}